Die cushion



R. W. GLASNER.

DIE CUSHION.

APPLICATION FILED MAY 28, 1920.

Patented Nov 7, 3922.

3 SHEETSSHEET 1.

R. W. GLASNER.

DIE CUSHION. APPLICATION FILED MAY 28, 1920.

Patented Nov. 7, 1922.

3 SHEETS-SHEET 2.

R. W. GLASNER.

DIE CUSHION. APPLICATION FILED MAY 28, 1920.

Patented. Nov. 7 1922.

mww

3 SHEETS-*SHEET 3.

' and which cushion is adapted tobe readily To azwamam aaea:

i Patented liloy. 7, v I

' TumTE p fjsTATj S" nu nonrn w. eLnsNER, or onrcaea rimmors.

PATENT- DIE cusn'xoit. v

Be "it known that I," RUDOLPH Gmsnnir, a citizen of the United States,residingat Chicago, in'the countyof Cook and State of Illinois, haveinvented certain new and vusefulImprovements in Die Cushions, of"

I which the following is a specification.

T This invention relates to improvements in die cushions of't he fluidpressure type embodying ycylinder and pistonelements,-

- installed orsecured to a 'die press.

' ployed, a Very large press. is necessary in v order to permit'acushion of "'sufici'ent size esirable for obvious reasons.

In the'installation of die presses it smstomary- 'to provide under thepress a space.

for the cushioning deviee that'is to be em ployed with' .the. press.These, spaces, are very limitedand if ta single cushion is emtobeemployed so asfto obtain the desired ressureon the draw rings-and thisis no ing the piston'displacement within a'limited area, soas toadapt-ca small press for a greater range of Work which ordinarilyrequires great pressure; 1 a A still another formof the-invention! I vIn the form of the invention asshown side of the piston fromwhichthepressure;

invention'and-i'n which a To the attainment of 'tii 'slaids andaccomplishment of "other new and useful ob' ject's as will appear,.theinyention consists in the features of novelty in substantially theconstruction, combination-and arrange; ment oftheseveralparts,hereinafter more fully described and claimed and'shownvinthe accomp' yin'g drawingsillustrating this,

Figure l'is a vert1calsectional view are die cushion of thischaracter"showing v same as applied, to a draw pressia'port ontof thedraw press being illustrated: in section.

Figure 2- is a view similarfto Figure l of, another formof the'inven'tionwj 1 1' Figure 3 is a View similartohFigure- 1 ofin Figure 1,the, cushion-embodies two superposed cylinders 10-'-11 secured together,the

end of one cylinder forming the end of the"; other cylinder, each' ofthe cylinders be1ng' I out of communicationwiththe atmosphere I g v F iforming block 33 and-the draw ring 32. The

on the release side of the piston,ior. on;that

1920. Serial"No."3 4,861.

is released. These cylinders are' supported fin position'in-any suitablemanner such as by meanscof a support ,12 secured to any fixed; partoj?the machine by means of suitable su iprting'. elements 13.

Mova lel'n thec 'linder- 10 is a piston 14 rovided with a; flexible andpreferably substantiallyicupped'shaped packing 15, and a' similar piston216 having a. similar pack- ".ing 17 is movable in the'cylinder11-.- I@These' pistons 14: and 16 .are connected together; Bind-held in" afixed relation with respectto each other by meansof a piston f rod 18oneendof whichis secured in any 'suitablemanner'such as by means of afasteningnut 19;to the piston 1e and the pise ton rod passes through theother-piston 16L The piston rod is'secured to this piston 16 a I in anysuitable manner such as by. means of a shoulder-2Q on the rod againstwhich the piston" 16ires'ts'. and a fastening nut or collar 2l ispreferably threaded upon the vpiston rod 18,,andc0-op'erates with theshoul v .rod together The piston 'rod 18 passes through; a suitablebushing or s'tufling boir Q22 in the end 23of the. cylinder 11 and exder20 forv securing; the piston and piston ten ds for any desired distancebeyond the end of the cylinders-and issecured in any suitable manner, toav pin plate 24:. The see curing means preferably ernbodiesa bolt 25whichgpasses.- through the'opposite side of the, pie plate 24::and isthreaded as at ,26 into the "end of ,the piston rod 18, the end of the'pisto'n rod being recessed into the i P 21 asat'27." s

v Thefpinplate '24 operatesjipon the pins '28 which latter passthroughabolsterplate- 29 and rests-npon the'pin plate 24.} In order Itopresent the. pins 28;*fron'1 dropping out of position when; the pinplate; 24 i's lowered to' the fegtent of its a lowering moyeinent the Ipins/28 jmay be .prqvide a with heads 30 adapted to, enter reces es .31in the bolster i s' oi-t drbythepins 304s 'adraw ring or grippingelement 32 which isof'an an nularconstruction so asto-permit aforn ingblock or die"33 to positloned upon the bolster plate 29 within the drawring 32 and so as to permit thefdraw ring to operate adjacent-[theperiphery or the iorming-Q draw; ring'132po operates with the die .34tofv .vices of this character.

grip and hold the material while the material is being formed over theblock '33 in the same manner as is well-known in' de:

The piston rod 18 is provided with a paslsageway 35 opening through thelower end thereof and thisv passage extends for any suitable distanceinto the piston and is provided with radial or laterally disposeddischarge outlets 36 which are so positioned that the outlets 36 willalways remain open and in such a position with respect to the movementof the piston 16 and the end of the cylinder 11 that fluid which isdelivered into the cylinder 10 belowthe piston 14, after having filledthe cylinder 10 will flow.

through the passage 35'and be discharged through the outlets 36 into thecylinder" 11 the fluid being supplied through any suitable supply pipe37, which latter may be cons.

nected with the supply or equalizingtank (not shown). 7 i

A stuflin box 38 may be provided in the end 39-0f t e cylinder 10 andthrough which stuffingbox the piston '18 passes, an adjust ingnut may beprovided for compressing I thepacking in the stufling box.

as be manifest that'the fluidfbeing supplied :into the lower cylinder 10through the sup- In order that the movement of the pistons will .notberetarded there may be provided in the cylinder 10-between the head 39'and the piston 14 a ventfopening 41 and a similar vent opening 42 maybeprovided in the cylinder 11 between the head 23 and the piston 16.

With this improved construction itwill ply pipe 37 will fill the end ofthe cylinder and will then pass throughthe-passage 35.. into thecylinder 11' to operate upon the pis ton 16 and thiswill raise the drawring 32 wardly to" allow the .materlal to be. shaped over the block 33-.[This downward move ment of the drawring32 will through the medium ofthe'pins 28 force the pin plate 324 downwardly and with it the pistons16 i and 14 causing-any fluidwhich may be held;

in. the cylinder ll to flow through the opening-36 into'the passage' 35inthe piston rod f to be-dis'chargedj into thecylinder 10. At the sametime any fluid in'thecylinder 10' will be forced/through the pipe 37back to the equalizing tan-k Figure2 the superp s'ed cylinders 43-44 aremovable .while the pistons 45 46' remain .stationaryand to'that end thepistons 45.-46- are connected with the piston" rod 47 having .6.

a passage 48 opening through one end thererod 47 is held stationary inany suitable "54 at one end, the rod passes through the .forms a closurefor the open end of the cyl-' "In. the form of the invention shown in.

of and a passage 49 opening through the sides of the piston rod, thefluidbeingsupplied through a supply pipe 50. The piston mannerpreferably by being connected with a support 51 by means of a suitablefastening collar 52 and which support 51 is anchored to any fixed partof the machine here shown as the bolster plate 29, although it 1sof'course to be understood that this fixed portion. of the machine maybe any part of the machine other than the bolster plate. This isaccomplished by means of the tie rods or anchoring bolts 53 having headssupport 51 so: that the head 54 will rest against one face thereof andthe fastening .collar 55 is mounted upon the threads 56- of the bolts orrods53 and clamp. the support 51 between th'ehead 54 and collar 55. The8. further end "of these rods or bolts, are anchored as at 5,7 by meansof a threaded engagement with the bolster plate 29.

The cylinders 43- 44 are respectively provided with flanges 58-59 havingopemngs therethrough and through which the bolts or rods 53 pass so thatthe cylinders will have a free vertical movementupon the rods 0r bolts53. In this form of the invention the lower end of the cylinder 43 ispreferably left open and as the fluid flows through the pipe 50 andpassage 48 it will be discharged through the outlets 49 into'thecylinder 43 between the piston 45 and-the head 60 thereof. At the sametime fluid \will flow through the open end of the passage 48 to bedischarged into the. cylinder 44;between the piston 46 and the head 61thereof. By

reason of the provision of the open end of the cylinder 43 no ventopening is-necessary L 5 'but the cylinder 44 is provided with a'ventopening 62 between thepiston 46 and the end '60 of the cylinder 43 andwhich end .60

inder44.. I

- It will therefore be seen that in this form of the'invention-thepistons remain station-v ary while the cylinders reciprocate withrespect thereto. and the pin plate maybe dispensed with as the end 61 ofthe cylinder 44 servesfafs the pin plate forsupporti-ng and operatingtheipins 28. I j )bviously the cylinders. 43-44'may be connected inany'f'suitable. manner and may,. I

if. desired, be provided with groove connections 6364. x

-In theform. of the invention shown in Figure 3 the cushionis of aconstruction and tongue and size-as to permit it to be arranged betweenthe bolster plate 29 and the draw ring 32, the formingiblock' 33 beingpreferably supported by means of the usual shims 65 and {is fastened bymeans of suitable-bolts 66.

In this form of the invention'there is provided .a' cylinder. 67havinganopen end its closed end 68 being secured t o the draw ring 32 in anysuitable manner such as by means of fasteningclips 69. The lowercylinder 7 is closed at both ends, one'endthereof tele scoping int thecylinder 67 and operating as a piston within the cylinder 67 and towhichend of "the cylinder is secured a cup shaped element 71v held inposition in any I h suitable manner; The cylinder 70 rests upon thebolster plate 29 and is secured thereto in any suitable manner such asby -means offastening clips 72 similar to the clips 69. ;Withl I in thecylinder 70 is a piston 73-preferably provided with a cup shaped washer,or element 74. A pistonirod 75 is secured by one end as at 76 to thepiston 73. This piston 80 opening rod passes through a suitable stuflingbox 7 7 in the end ofthe cylinder 7 0 and extends through the cylinder67 and is anchored as at 78*totheend 68 of the cylinder 67. 7 With thisconstruction it willbe manifest that the cylinder 67 the piston rod 75and the piston 7 3- are fixed with respect to each other, the cylinders70 and 67 being movable relatively one with relation to thevother.

The fluid ,is supplied into the cylinder 70 .by means of a. supply pipe'1 9 which is connected with the supply or equalizingtank or from anysuitablesource' and discharges the fluid between the piston 73 and thelower end of the cylinder.""When tliecylinder is filled'the fluid will,flow throu h a passage through the end ofti 7 5 and W111 be dischargedinto the cylinder 67 through the openings 81 when, the cylinders andpistons are moving with respect to each other infione direction. "Whenhow-- ever the cylinders and pistons are movingin opposite directionswith'respect to each other the fluid will be forced \out of the cylinder67, throughthe openings 81, passage into the cylinderZO and from therethe fluid will [be forced through the-outlet pipe 79.

,- be employed andarranged in any suitable position between the bolsterplate, and the Obvious'l' I with this formof the invention any suitab enumber ofthese cushions may 'draw ring 32.

' and superposed ione'upon the other to meet pressurei,

the existing conditions and inasmuch as the cylinders are superposed thecushion may be arranged'within the, limited space provided under thepress for that purpose. Furthermore by superposing' the cylinders andpistonsany-number of elements may be femvployed-thatj are necessaryand'fo'r the purpose. of'increasing the piston displacement.

withinalimited area; This arrangement "is advantageous inasmuch as itpermits a small press to be adapted for a greater range vwork which;

ordinarily requires great This not always possible to arrange be- Withthis, improved construction any. suitable number'of cylinders may bealined adapted to be freely attached and detached andlcan be readilyapplied toany form of machinenow on the market. a

While the preferred forms of the invention have been herein shown-anddescribed,

it is to b'e' understood that various changes may be made in the detailsof construction and inthe combination and arrangement of the severalparts Within the scope of the claims without departing from the spiritof this invention. 1

'- What is claimed as new v I. In combination, a draw press embodyaforming block, blank holding means for' h the materialto' be, formed, afluid pressure cushion acting -on,the said blank holding means, saidcushion embodying a plurality of superposed cylinders outofcommunicationwith the atmosphere on the release side 1 of the piston,piston elements individual to the cylindersQsaid pistons, and cylindersbeing movable relatively one'with respect to the other, and meansconnecting one of i the .cushion elements with the said blank e pistonrod holding means, another of the cushion elements being connected afixed sup- Port; w v 2. In combination, a draw press embodying aforming.block,,blank holding means for the material to be 'formed,-afluid pressure cushion acting on the said'blank holding means, saidcushion'embodying a plurality of superposed 'cy linders, piston eletonsandcylinders being movable relatively one with respectito the other,means con- .necting one, of thecushion elements with the said blankholding means, another of the cushion elements being connected with afixed support wherebythe cushion pressure obtained is substantiallyproportionate to the number of cylinders and afluid equalizing inlet andoutlet vhaving commuii'icatlon with the interior of the'cu'shion.

T 3. In combination, a draw press embody- .inga forming block,blankholding means for the material to be formed, afluid pressure cushionacting on the said blank holding means, saidl cushion embodyinga-plurality 'ments individual to the cylinders, said pis- I ofsuperposed cylindersiout ofcommunication with the atmosphere on therelease side of the piston, piston elements individual to the cylinders,said pistons and cylinders being movable relativelyone with respect tothe other, means. connecting one of the cushion elements with" the saidblank holding 'means, another of the cushion elements being connectedwith afixed support, and ya fluid equalizing inlet and outlet, havingcommunication with one of the-cylinders, there being communicatingpassage ways between the cylinders.

4. In combination, a draw press embodying a formin holding means, saidcushion embodying a plurality of superposed cylinders, piston elementsindividual to the 'cylinders,'said pistons and cylinders being movablerela-- means, said cushion embodying a plurality of superposedcylinders,-piston elements individual to the cylinders, said pistons andcylinders bein'gmovable relatively one with relation to the other, meansconnecting one of the elements .of the cushion with the said blankholding means, another of the cushion elements being connected withafixed support, one of said cylinders having a fluid equalizing inletandoutlet, and means whereby the fluid may be successively supplied to andremoved from-the cylinders.

6. In combination, a draw press embodying a formingblock, blank holdingmeans,

for the material to be formed, a freely attachable and detachableself-containedfluid pressure cushion for maintaining a substan tiallyunvaryin'g pressure upon the said blank holding means, said cushionembodying a plurality of alined and superposed cyl-' block, blankholding means for the material to be formed, a fluid pres sure cushionacting upon the said blankinders, piston elements individual to thecylinders, said pistons and cylinders being relatively movable one withrelation to the I other, and! means connecting one of the cushionelements with the said blank holding means, another of the cushionelements being connected with a fixed support.

7; In combination, a draw press embodying a forming block, blank holdingmeans for the material to be formed, a freely attachable and detachableself-contained fluid pressure cushion for maintaining a substan-' tiallyunvarying pressure upon the said blank holding means, said cushionembodying a plurality of alined and superposed cylinders, pistonelements individual to the cylinders, said piston and cylinders beingrelatively movable one with .relation to the o o other, means connectingone of the cushion elements-with the said blank holding means, anotherof the cushion elementsbeing connected with a fixed support, and meanswhereby the fluidwill be successively delivered 'to and from thecylinders.

8. In combination, a draw press embodying a forming'block, blank holdingmeans for the material to be formed, a freely attachable and detachableself-contained fluid pressure cushion formaintaining a substan'-- tiallyunvarying. pressure upon the said blank holding means, said cushionembody- [ing a plurality of alined and superposed cylinders, pistonelements individual to the cyl-L ,inders, said piston and cylindersbeing rela-" tively movable one with relation to the other, 4 meansconnecting one of the cushion ele-" ments with the saidblank holdingmeans, another of the cushion elements belng con,-

nected with a fixed support, and a piston rod connectedwith the pistoninone of the -cyl-'v rod extending through the inde-rs, said pistonother cylinder;

In testimony ofMay, A,;D. 1920. RUDOLPH GLASNEB.

whereof 'I- have signed my name to this specification, on this 13th daygin.

